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Prendy like I mentioned before I have just tuned a WiFi rival in a way no one has before , as far as I am aware . I had a chat with Stephen ( Fibre Lyte) I opted to go 14 and 12 carbon jockey wheels .
I’m not sure about the chain bend on shorter mechs with a 15 and 12 , the curve is quite significant.
I post the mech when the jockey wheels arrive. and I have tested it .

Can anyone give the reason why some uses jockey wheels of the same sizes and others use different sizes for each? Ceramicspeed has 17t-17t for their sram version but 12t-17t for shimano version, why is that?

Prendy like I mentioned before I have just tuned a WiFi rival in a way no one has before , as far as I am aware . I had a chat with Stephen ( Fibre Lyte) I opted to go 14 and 12 carbon jockey wheels .
I’m not sure about the chain bend on shorter mechs with a 15 and 12 , the curve is quite significant.
I post the mech when the jockey wheels arrive. and I have tested it .

Post a picture! I contacted Stephen and I was told that he is not making the CF jockey wheels for not because the supplier for his "bearing" (equivalent) is unable to supply him anymore. Is he sending you existing stock?

Kayrehn wrote:
Can anyone give the reason why some uses jockey wheels of the same sizes and others use different sizes for each? Ceramicspeed has 17t-17t for their sram version but 12t-17t for shimano version, why is that?

I'm not sure, but off the top of my head a guess might be one's shifting/range of cassette possibly?
The other might be weight - 12t is lighter than 17t.

The RockBros cage comes with their ceramic pulleys and they spin incredibly smooth in hand. I'll have to get around to making a video and posting it, it's a bit unreal.

Prendy like I mentioned before I have just tuned a WiFi rival in a way no one has before , as far as I am aware . I had a chat with Stephen ( Fibre Lyte) I opted to go 14 and 12 carbon jockey wheels .
I’m not sure about the chain bend on shorter mechs with a 15 and 12 , the curve is quite significant.
I post the mech when the jockey wheels arrive. and I have tested it .

Post a picture! I contacted Stephen and I was told that he is not making the CF jockey wheels for not because the supplier for his "bearing" (equivalent) is unable to supply him anymore. Is he sending you existing stock?

Kayrehn wrote:
Can anyone give the reason why some uses jockey wheels of the same sizes and others use different sizes for each? Ceramicspeed has 17t-17t for their sram version but 12t-17t for shimano version, why is that?

I'm not sure, but off the top of my head a guess might be one's shifting/range of cassette possibly?
The other might be weight - 12t is lighter than 17t.

The RockBros cage comes with their ceramic pulleys and they spin incredibly smooth in hand. I'll have to get around to making a video and posting it, it's a bit unreal.

He did mention he was having a time issue with the jockey wheels but has not cancelled my order .
I will email him and find out , I ordered the jockey wheels quite a while ago. Other parts have arrived . I’m waiting for a 53 t single speed chain ring for my clavicula and the jockey wheels .
hopefully I’m still getting them.

You can see i have chopped the rear section out . I tried this because the wi fli has more material there. I doubt this would work on a short cage , destroyed.
The spring tension is fine and feels as strong as my short cage red tunings .
This is a significant weight loss, if this works with a red wi fli you should be in the 70 gram area. The only issue could be that the red material is not as strong as the rival.
Like I said , soon as jockey wheels arrive I will give it a go , I have a carbon cage going on the rear.
If it works I may try it on a red wi fli or if any one out there wants to give it a go I’d be interested to see how it holds up. I have not weighed it . I will when all the parts arrive.

Thanks for the measurements @Prendrefeu - I measured my Sram etap wifli derailleur as well and the bolt-to-bolt centre distance is about 81mm.

I did a bit of googling and found out from a bikeradar article that having a normal 11t or 12t for the top pulley makes shifting more crisp.

How about we ask Stephen for a custom pair of carbon 17t and split the costs eh @Prendrefeu Gotta say that his pulley wheels uses bushings instead of bearings and hence don't spin freely, but they sure are light!

Had a mail chat with Stephen, right now jockey wheels are not available.
Not sure now what I’m going to do . I do have normal size carbon jockey wheels but on the wi fli wanted to use bigger jockey wheels . May just try and find some light cnc 15t from somewhere and use a 5grm 11t that I already have.